Flat bed trailer



FIG. 1 is a front perspective view of a flat bed trailer showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in FIGS. 3 and 5 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a flat bed trailer, as shown and described. 